//======================================================================== // // OutputDev.h // // Copyright 1996-2003 Glyph & Cog, LLC // //======================================================================== #ifndef OUTPUTDEV_H #define OUTPUTDEV_H #include #ifdef USE_GCC_PRAGMAS #pragma interface #endif #include "gtypes.h" #include "CharTypes.h" class GString; class GfxState; struct GfxColor; class GfxColorSpace; class GfxImageColorMap; class GfxFunctionShading; class GfxAxialShading; class GfxRadialShading; class Stream; class Links; class Link; class Catalog; class Page; class Function; //------------------------------------------------------------------------ // OutputDev //------------------------------------------------------------------------ class OutputDev { public: // Constructor. OutputDev() {} // Destructor. virtual ~OutputDev() {} //----- get info about output device // Does this device use upside-down coordinates? // (Upside-down means (0,0) is the top left corner of the page.) virtual GBool upsideDown() = 0; // Does this device use drawChar() or drawString()? virtual GBool useDrawChar() = 0; // Does this device use tilingPatternFill()? If this returns false, // tiling pattern fills will be reduced to a series of other drawing // operations. virtual GBool useTilingPatternFill() { return gFalse; } // Does this device use functionShadedFill(), axialShadedFill(), and // radialShadedFill()? If this returns false, these shaded fills // will be reduced to a series of other drawing operations. virtual GBool useShadedFills() { return gFalse; } // Does this device use drawForm()? If this returns false, // form-type XObjects will be interpreted (i.e., unrolled). virtual GBool useDrawForm() { return gFalse; } // Does this device use beginType3Char/endType3Char? Otherwise, // text in Type 3 fonts will be drawn with drawChar/drawString. virtual GBool interpretType3Chars() = 0; // Does this device need non-text content? virtual GBool needNonText() { return gTrue; } //----- initialization and control // Set default transform matrix. virtual void setDefaultCTM(double *ctm); // Check to see if a page slice should be displayed. If this // returns false, the page display is aborted. Typically, an // OutputDev will use some alternate means to display the page // before returning false. virtual GBool checkPageSlice(Page * /*page*/, double /*hDPI*/, double /*vDPI*/, int /*rotate*/, GBool /*useMediaBox*/, GBool /*crop*/, int /*sliceX*/, int /*sliceY*/, int /*sliceW*/, int /*sliceH*/, GBool /*printing*/, Catalog * /*catalog*/, GBool (* /*abortCheckCbk*/)(void *data) = NULL, void * /*abortCheckCbkData*/ = NULL) { return gTrue; } // Start a page. virtual void startPage(int /*pageNum*/, GfxState * /*state*/) {} // End a page. virtual void endPage() {} // Dump page contents to display. virtual void dump() {} //----- coordinate conversion // Convert between device and user coordinates. virtual void cvtDevToUser(double dx, double dy, double *ux, double *uy); virtual void cvtUserToDev(double ux, double uy, int *dx, int *dy); double *getDefCTM() { return defCTM; } double *getDefICTM() { return defICTM; } //----- save/restore graphics state virtual void saveState(GfxState * /*state*/) {} virtual void restoreState(GfxState * /*state*/) {} //----- update graphics state virtual void updateAll(GfxState *state); virtual void updateCTM(GfxState * /*state*/, double /*m11*/, double /*m12*/, double /*m21*/, double /*m22*/, double /*m31*/, double /*m32*/) {} virtual void updateLineDash(GfxState * /*state*/) {} virtual void updateFlatness(GfxState * /*state*/) {} virtual void updateLineJoin(GfxState * /*state*/) {} virtual void updateLineCap(GfxState * /*state*/) {} virtual void updateMiterLimit(GfxState * /*state*/) {} virtual void updateLineWidth(GfxState * /*state*/) {} virtual void updateStrokeAdjust(GfxState * /*state*/) {} virtual void updateFillColorSpace(GfxState * /*state*/) {} virtual void updateStrokeColorSpace(GfxState * /*state*/) {} virtual void updateFillColor(GfxState * /*state*/) {} virtual void updateStrokeColor(GfxState * /*state*/) {} virtual void updateBlendMode(GfxState * /*state*/) {} virtual void updateFillOpacity(GfxState * /*state*/) {} virtual void updateStrokeOpacity(GfxState * /*state*/) {} virtual void updateFillOverprint(GfxState * /*state*/) {} virtual void updateStrokeOverprint(GfxState * /*state*/) {} virtual void updateTransfer(GfxState * /*state*/) {} //----- update text state virtual void updateFont(GfxState * /*state*/) {} virtual void updateTextMat(GfxState * /*state*/) {} virtual void updateCharSpace(GfxState * /*state*/) {} virtual void updateRender(GfxState * /*state*/) {} virtual void updateRise(GfxState * /*state*/) {} virtual void updateWordSpace(GfxState * /*state*/) {} virtual void updateHorizScaling(GfxState * /*state*/) {} virtual void updateTextPos(GfxState * /*state*/) {} virtual void updateTextShift(GfxState * /*state*/, double /*shift*/) {} //----- path painting virtual void stroke(GfxState * /*state*/) {} virtual void fill(GfxState * /*state*/) {} virtual void eoFill(GfxState * /*state*/) {} virtual void tilingPatternFill(GfxState * /*state*/, Object * /*str*/, int /*paintType*/, Dict * /*resDict*/, double * /*mat*/, double * /*bbox*/, int /*x0*/, int /*y0*/, int /*x1*/, int /*y1*/, double /*xStep*/, double /*yStep*/) {} virtual GBool functionShadedFill(GfxState * /*state*/, GfxFunctionShading * /*shading*/) { return gFalse; } virtual GBool axialShadedFill(GfxState * /*state*/, GfxAxialShading * /*shading*/) { return gFalse; } virtual GBool radialShadedFill(GfxState * /*state*/, GfxRadialShading * /*shading*/) { return gFalse; } //----- path clipping virtual void clip(GfxState * /*state*/) {} virtual void eoClip(GfxState * /*state*/) {} virtual void clipToStrokePath(GfxState * /*state*/) {} //----- text drawing virtual void beginStringOp(GfxState * /*state*/) {} virtual void endStringOp(GfxState * /*state*/) {} virtual void beginString(GfxState * /*state*/, GString * /*s*/) {} virtual void endString(GfxState * /*state*/) {} virtual void drawChar(GfxState * /*state*/, double /*x*/, double /*y*/, double /*dx*/, double /*dy*/, double /*originX*/, double /*originY*/, CharCode /*code*/, int /*nBytes*/, Unicode * /*u*/, int /*uLen*/) {} virtual void drawString(GfxState * /*state*/, GString * /*s*/) {} virtual GBool beginType3Char(GfxState *state, double x, double y, double dx, double dy, CharCode code, Unicode *u, int uLen); virtual void endType3Char(GfxState * /*state*/) {} virtual void endTextObject(GfxState * /*state*/) {} //----- image drawing virtual void drawImageMask(GfxState *state, Object *ref, Stream *str, int width, int height, GBool invert, GBool inlineImg); virtual void drawImage(GfxState *state, Object *ref, Stream *str, int width, int height, GfxImageColorMap *colorMap, int *maskColors, GBool inlineImg); virtual void drawMaskedImage(GfxState *state, Object *ref, Stream *str, int width, int height, GfxImageColorMap *colorMap, Stream *maskStr, int maskWidth, int maskHeight, GBool maskInvert); virtual void drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str, int width, int height, GfxImageColorMap *colorMap, Stream *maskStr, int maskWidth, int maskHeight, GfxImageColorMap *maskColorMap); #if OPI_SUPPORT //----- OPI functions virtual void opiBegin(GfxState *state, Dict *opiDict); virtual void opiEnd(GfxState *state, Dict *opiDict); #endif //----- Type 3 font operators virtual void type3D0(GfxState * /*state*/, double /*wx*/, double /*wy*/) {} virtual void type3D1(GfxState * /*state*/, double /*wx*/, double /*wy*/, double /*llx*/, double /*lly*/, double /*urx*/, double /*ury*/) {} //----- form XObjects virtual void drawForm(Ref /*id*/) {} //----- PostScript XObjects virtual void psXObject(Stream * /*psStream*/, Stream * /*level1Stream*/) {} //----- transparency groups and soft masks virtual void beginTransparencyGroup(GfxState * /*state*/, double * /*bbox*/, GfxColorSpace * /*blendingColorSpace*/, GBool /*isolated*/, GBool /*knockout*/, GBool /*forSoftMask*/) {} virtual void endTransparencyGroup(GfxState * /*state*/) {} virtual void paintTransparencyGroup(GfxState * /*state*/, double * /*bbox*/) {} virtual void setSoftMask(GfxState * /*state*/, double * /*bbox*/, GBool /*alpha*/, Function * /*transferFunc*/, GfxColor * /*backdropColor*/) {} virtual void clearSoftMask(GfxState * /*state*/) {} //----- links virtual void processLink(Link * /*link*/, Catalog * /*catalog*/) {} #if 1 //~tmp: turn off anti-aliasing temporarily virtual GBool getVectorAntialias() { return gFalse; } virtual void setVectorAntialias(GBool /*vaa*/) {} #endif private: double defCTM[6]; // default coordinate transform matrix double defICTM[6]; // inverse of default CTM }; #endif